Star Wars: Episode III -- Revenge of the Sith is the final installment in George Lucas' legendary sextet of sci-fi films. While the movies have done a great job of teaching us all about the Jedi, their shadowy foe the Sith haven't really been explained all that well.

Have you ever wondered exactly who the Sith are, where they came from, and why they are considered so evil? Why is it that, as Yoda says, "Always two there are, no more, no less"? Why are their lightsabers always red, and what's with all this vengeance?

Well it turns out, as with all things Lucas, there is a pretty huge story behind it all that has played out in comics, novels, video games and various other media over the past thirty years. Once you really sift through all there is to know about the Sith, you'll find there's quite a bit to these guys. What you see in the movies is far from the first or worst time the Sith and the Jedi have squared off.